Method of truing up and renewing leather-covered rolls.



J. B. HUDSON. METHOD OF TRUINO DP AND RBNEWINO LEATHER COVERED ROLLS.

APPLICATION PILED MARA, 1914.

Patented Nov. 24, 1914.

r E 0 mm, mw n ww i f w n .l n. a JQ W. www# .Imm L y renza/l JAMES LB. HUDSON, OF CHARLOTTE, NORTH CAROLINA.

METHOD 0F TRUING UP AND RENEWING LEATI-IEIVCOVERED BiOLl3S.I

Specification of LettersPatent.

Patented Nov. 24, 191.4.

Application led March 4, `1914. Serial No. 822,460.

To all whom it may concern y Be it known that I, JAMES B. Huesos, a `citizen of the United States, residing at Charlotte, in the county of Mecklenburg and State of North Carolina, have invented new and useful Improvements in Methods of Truing Up and Renewing Leather-Covered Rolls, of which the follow-ing is a speci fication.

This invention relates to an improved method of truing up and leather' covered rolls of cotton spinning or twisting machines, proposing a method which is especially applicable to Ithe rolls designated according to their sizes and to their relation in the machine as slubbers, intermediates, Speeders and spinning rolls.

The object of the invention is to provide a method by which rolls of the character stated, when badly worn, can be rapidly and inexpensively `trued That is to say, the object of the method is two-fold; first, to restore the roll to a uniform cylindrical outline throughout its extent, and second, to renew the wearing surface of the roll whereby said surface shall have the same e'flicient properties in its action on the `thread as that of the surface of anew roll or of a roll newly covered.

Ordinarily, rolls of the character referred to, when badly worn, are re-covered; that is to say, the leather covering of the roll is wholly removed and an entirely new covering is substituted. As the number of rolls used in the average cotton mill is relatively large and as the occasions for the renewal of the leather coverings of these rolls are relatively frequent, the expense involved in renewing the rolls by substituting a new leather cover is considerable and represents a relatively large item in the cost of up-keep of `any `well regulated modern plant. The method proposed by the present invention substantially reduces the item of expense referred to, since it not only effects a great economy of time, but it 1s also substantially and intrinsically less eX- pensive.

The accompanying drawings illustrate certain implements or appliances by which the various steps of the method may be conveniently and rapidly carried out.

In said drawings z-Figures 1, 2 and 3 are views showing appliances used 1n the renewing the y up and renewed.

may be used `ing the roll back practice of the method and showing the manner in which the steps of the method are best performed.

Similar characters of reference designate corresponding parts throughout the several views.

A selection having been made of those rolls which are in condition fit for renewal by the present method, the said rolls are first cleaned by brushes, brooms, or other suitable means so as to remove from their surfaces all lint and other extraneous matter. The vital clement of the process as applied to all rolls is what may be conveniently termed a renewing solution. All of the rolls to be restored, after having had their surfaces cleaned of lint, as above stated, are first treated with this renewing solution, which has the essential properties of penetrating or permeating the leather covering of the rolls, of softening the fibers of said covering, and of giving the badly worn or dead leather new life and resiliency. Any solution which has these properties to a sutliciently marked degree and which is not otherwise detrimental to the leather, in practising the method. It has been found, however, that the solution most satisfactory for this purpose, consists of like parts `of water, wood alcohol, and

cotton-seed oil, with a small amount vof gum and a small amount of sodium sulite,

bleaches the solution and insures of its uniform consistency. A convenient method of applying .the renewing solution to the `rolls is shown 1n Fig. 1 and conslsts in the use of a pad `A of absorbent material, andofa mitt or glove B also of absorbent material. A suitable quantity of `the renewing solutionis pour-e lowecl to soak into this pad or may be worked into the pad by means of a brush or other suitable implement. The worn roll is thereupon `placed upon the pad and rolled back and forth thereon, the operator workand forth with the mitt or glove B, which composed of absorbent material and aids in distributing the solution uniformly over the leather' surface of the roll. The renew ing solution, as above stated, thoroughly d upon the padA and is al-` has its surface preferably and very rapidly permeates the leather covi meates the cover, sufficient for the purposes of the invention, within a few seconds of time following its application.

The second step in the method, to all rolls, is to subject them to ous heat and pressure, preferably by ironing them on a metallic plateor table C. This plate is heated by any suitable means, conveniently, a gas stove, the degree of heat being determined by the skill and discretion of the operator, the reoiuirement being that it shall be sufficient to restore the roll to uniform cylindrical contour and to dry the renewing solution incerporated inthe leather, but not sufficient to bake or injure the leather. The roll is worked back and forth across the hot plate C by any suitable means, conveniently, a paddle l). By virtue of this step, the roll is ironed out, so to speak, and its leather covering is restored to a uniform as applied simultane- `cylindrical outline throughout its extent,

and the renewing solution is heated and dried within said leather covering, so that its beneficial properties above explained are substantially aided.

The two steps above set forth, viz: first treating the roll with a renewing solution and then ironing the roll on a heated plate, are carried out in all cases. TW here the speciiic means shown in the drawings is employed foiI effecting these steps, a few reciprocations of the rolls across the pad A or the hot plate C, as the case may be, is sufficient.

Following the second step, viz: ironing .the roll on the hot plate, it is necessary to discriminate in practising the remaining steps of the method between the more badly worn rolls on the one hand, usually the middle and back rolls, and the less badly worn rolls on the other hand, usually the front rolls, and also to discriminate between rolls whose surfaces although ,deformed are relatively smooth, and rolls whose surfaces are not only deformed but are creased, scored,

vQor scaled. It is convenient to first describe the invention .in connection with the more badly worn rolls, e. g., the back or middle rolls, and it is assumed-that these rolls have been subjected to the two steps of the method above described, that is, that they have first been treated with the renewing solution and then ironed out on the hot plate. When the rolls are removed from the hot plate, they are substantially dry, but, as a matter of precaution, it is preferred to allow them to remain idle for a few seconds, to insure that the drying of their leather coverings is complete.

The final step in the method, as applied to worn middle or back rolls, .is the treatment of these rolls with what may be conveniently termed a toughening solution. rflue properties of the solution are that it permeates the surface of the leather to a very slight extent,- and that it uniformly` toughens the :aliases fibers of the leather throughout the permeated zone. rllhe toughening solution thus produces, in effect, a tenacious wear-resisting skin which is exceedingly efficient in resisting the wearing action of the threads which pass across the surface of the rolls. The invention is, of course, not restricted to any particular kind of tcughening solution, and contemplates any solution which will furnish the results stated and will not be otherwise detrimental to the leather. It has been found, however, that the best results are obtained by the use of a solution composed of like parts of leather extract and wood alcohol. The leather cextract is obtained by immersing leather scraps in a solution composed of caustic soda and water in the proportions, for example, of a pound of leather scraps, half a gallon of water, and a half pound of caustic soda. This mixture is allowed to stand for a half hour or more and is thereupon strained. The resulting product of course contains the soluble constituents of the leather, and when combined with wood alcohol and applied to the leather covering of the rolls, fills the softened and distended fibers or cells of the leather, attacking the leather uniformlyv and by virtue of its combination with wood alcohol drying very rapidly.

Any desired means may be employed for applying the toughening solution to the rolls. it is preferred, however, to employ means similar to that employed for the apj plication of the renewing solution, such means consisting' of an absorbent pad E and a glove or mitt F. The pad E is similar to but entirely distinct from the pad A above described, and the mitt orglove F is, in like manner, similar to but entirely distinct from the initt orglove B above described.

The manner of applying the tougheningy solution is the same as that of applying the renewing solution..y A. suitable quantity of the solution is poured upon the pad E and is allowed to soak in or is worked in by the use of a suitable implement. The rolls,when

dried, are reciprocated a few times across the pad E, the mitt F, which preferably also has an absorbent surface, being used for this purpose.

lThe rolls after their treatment 4with the toughening solution are allowed to stand until dry. and as above stated, dry very rapidly. When dry, they are preferably dusted with talcum powder before being restored to the frames. y

In connection with the renewal of the less badly worn rolls, e. g., the front rolls, the method is varied following the second step, z'. e., the ironing of the rolls upon the hot plate C. l The front rolls are the power rolls, and it is therefore important that their surfaces should not only be regular, but; should longed and the expense gaging the threads. In the treatment of the y front rolls, it is neither `necessary nor desirable to heat the plate C to the same de gree asisrequired for the treatment of the back and middle rolls. This is for the reason that it' the plate C is too highly heated, it is apt to harden the surface of the roll, and hence, to interfere `with the necessary property of said surface ot frictionally engaging,the threads, heat of the plate C for the treatment of `the front rolls can readily be determined by the operator. lVhen the 'front rolls are merely worn, but their surfaces are relatively smooth, they are not treated with the toughening solution above described. Following the second step oil.5 the method, ing of said rolls on the hot plate, they are a second time treated with the renewing solution, the pad and mitt or glove B being used in the same manner as in the first in-` stance. rlhis second treatment with the re newing solution insures that the surface oit the rolls shall have the property oit frictionally engaging the threads, which property might not be present or at least sul'liciently developed immediately upon the completion of the ironing operation. Following the second application ofthe renewing solution, the rolls are allowed to stand until dry, and when` dry, are dusted with taleum powder and thereafter restored to their frames.

Front rolls which have `their surfaces badly scaled are treated in the same way as front rolls which have smooth surfaces, eX y cept that an additional step of treating said scaled front rolls with the toughening solution is introduced between the ironing `step and the step of making a second application of the renewing solution.

It has been conclusively determined by actual practice that rolls treated by the above method in the manner described are in substantially as good condition, both as regards their uniformity of outline and as rcgards the character of their wearing surfaces, as new rolls. By virtue of the method, the efficient liil'e of a roll is greatly proof overhauling the rolls in a cotton mill 4plant is greatly reduced, not only because of the great reduction in time required for overhauling the rolls, but also because of the elimination of the intrinsic expense of new leather covers.

In the preceding description reference has been made to the several steps ot the method in connection with a single roll. It will be understood, however, that in actual practice a number' oit rolls, selected according to the choice and ability of the operator, are treated simultaneously; that is to say, a number of rolls are simultaneously recipro cated across the pads A, and .E as the case may be. The capacity of the invention for the simultaneous treatment of a number of i The proper degree ol? i rolls is a further factor in the elimination of expense and `delay in ovcrhauling a rela-` tively large plant.

Having fully described my invention, I claim:

l. A method oi restoring worn leather covered cotton mill rolls which consists in treating the roll with a renewing solution havingthe properties ot' permeating the lcathm' covering, o'l softening the fibers oi said covering, and of giving the leather new lit'e and resiliency and then subjecting thc roll to simultaneous heat and pressure.

.il `method ol' restoring worn leather covered cotton mill rolls which consists in treating the roll with a renewing solution having thc properties of iierincating the ,leather covering, olf softening the fibers ol' said rovcringnarul oi giving the leather new lil and resiliency and then ironing7 the ro El. A` method oi" restoring `worn leather l lile and resiliency, in then subjecting the i roll to simultaneous heat and pressure, and in subsequently treating the roll with a toughening solution.

Ll. A method olz restoring worn leather revered cotton mill rolls which consists in treating the roll with a renewing solution having the properties olf permeating the leather covering, of softening the fibers ot said` covering, and ol? giving the leather new li'lic and resiliency, in then ironing the roll, and in subscql'lcntly treating the roll with a y toughening solution.

A method of restoring worn leather covered cotton mill rolls which consists in treating the roll with a renewing solution composed of wood alcohol, cotton-seed oil and gum tragacanth, and thereafter in subjecting the roll to simultaneous heat and pressure.

6. A method oit restoring worn leather covered cotton mill rolls which consists in treating the roll with a renewing solution composed ot wood alcohol, cotton-seed oil and gum tragacanth, and thereafter inironing the roll.

7. A method of restoring worn leather covered cotton mill rolls which consists in treating the roll with a renewing solution composed o'lE wood alcohol, cotton-seed oil and gum tragacanth, thereafter in subjecting the roll to simultaneous heat and pres sure, and in subsequently treating the roll with a toughening solution.

S. A method of restoring worn leather covered cotton mill rolls which consists in treating the roll to restore it to true cylindrical outline and in the subsequent stepof treating the roll With a solution composed of Wood alcohol and leather extract.

9. A method of restoring Worn leather coV- ered cotton mill rolls Which consists in treating the roll to restore it to true cylincli-ical outline and in the subsequent step of treating the roll with a solution composed oi Wood alcohol and a. miXtin'e obtained by dissolving leather' scraps in an alkaline solution.

l0. A method of restoring Worn leather coveretlL cotton mill rolls Which consists in iirst treating the roll with a renewing solution haring the properties ot' Jermeatine the leather covering, of softening the ibers of said covering, and ol giving the lea-ther new lire and resiliency, and in then subjecting the roll to simultaneous heat and pressure anal in subsequently treating the roll with a toughening solution composed of wood alcohol and a. mixture obtained by dissolving leather scraps in an alkaline solution.

ll. A methodL of restoring -Worn leather covered cotton mill rolls which combines the steps of treating the roll With a renewing solution having the properties of permeating the leather covering, of softening the fibers of saicl covering, and or giving the leather .new life and resiliency and of subjecting the roll to simultaneous heat and pressure.

l2. A method ot' restoring Worn leather covered cotton mill rolls Which combines the steps of treating the roll With a renewing solution composed of Wood alcohol, cot- 1,11e,eea

ton-seed oil and gum tragacantli, and of subjecting the roll to simultaneous heat and pressure.

13. A method of restoring Worn leather covered cotton mill rolls which consists in melting a surface application to the roll of a renewing solution having the properties of permeating the leather covering, of soi'- teing the fibers of said covering, and of giving the leather new life and resilieney and in subjecting the roll to simultaneous heat and pressure.

le. A method ot' restoring Worn leather covered. cotton mill. rolls Which consists in making a surface application to the roll of a renewing solution haring the properties o t' permeating `the leather covering, of softening the fibers of said covering, and of giving the leather newT life and resiliency, in subjecting the roll to simultaneous heat and pressure, and in making a subsequent appliV cation of a toughening solution l5. A. method of restoring leather covered cotton mill rolls Which consists in treating the roll to restore it to true cylindrical outline, and in the subsequent step of treating the roll With. a toughening solution.

ln testimong7 whereof l have hereunto set my hantl in presence ol' two subscribing Wit* nesses.

' JAMES B. HUDSON. Witnesses: JOHN S. POWERS, Criss. S. HYER.

Copies of this patent may be obtained for live cents each, by addressing the Commissioner of Eatents, Washington, D. C. 

